/Engine/Plugins/Runtime/Metasound/Source/MetasoundFrontend/Public/MetasoundFrontendSearchEngine.h
Find all FMetasoundFrontendClasses. (Optional) Include all versions (i.e. deprecated classes and versions of classes that are not the highest major version).
[TArray](API\Runtime\Core\Containers\TArray)< [FMetasoundFrontendClass](API\Plugins\MetasoundFrontend\FMetasoundFrontendClass) > FindAllClasses ( bool bInIncludeAllVersions )